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 * This file is part of SpongeAPI, licensed under the MIT License (MIT).
 *
 * Copyright (c) SpongePowered <https://www.spongepowered.org>
 * Copyright (c) contributors
 *
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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package org.spongepowered.api.advancement.criteria;

import java.util.Collection;
import java.util.Optional;

public interface OperatorCriterion extends AdvancementCriterion {

    /**
     * Attempts to find all the children {@link AdvancementCriterion}s
     * with the specified name. The children will be checked recursively.
     *
     * @param name The name
     * @return The criteria
     */
    Collection<AdvancementCriterion> find(String name);

    /**
     * Attempts to find the first child {@link AdvancementCriterion} with
     * the specified name. The children will be checked recursively, but
     * direct children are prioritized.
     *
     * @param name The name
     * @return The criterion
     */
    Optional<AdvancementCriterion> findFirst(String name);

    /**
     * Gets the children {@link AdvancementCriterion}s of this
     * {@link OperatorCriterion}. May contain
     * {@link OperatorCriterion}s.
     *
     * @return The criteria
     */
    Collection<AdvancementCriterion> getCriteria();

    /**
     * Gets the leaf {@link AdvancementCriterion}s. This means that there will
     * never be any {@link OperatorCriterion}s in this list.
     *
     * @return The leaf criteria
     */
    Collection<AdvancementCriterion> getLeafCriteria();
}
